So the three characters in the circles are chinese (Mandarin or Cantonese I don't know) I've emailed my friend who speaks Mandarin for a translation. She speaks it and might not be able to read it. (I'd punch it into google translator but it's a jpeg not text...)

The bottle is similar but different chinese characters. Good catch though! I found a fan made sticker for the spinner...

I also found this great model on Flickr. User "take.1" He has the decal with something else I couldn't make out. I emailed him as well for a close up.

Sad to say much is confusing in the english to japanses translating on NYzeki's incredible blog. From what I'm meekly understanding they guess the rest of the decal next to the three circles might be a chinese horoscope calendar of some sort. I could be way off on that but who knows...

The 44 spinner in Seattle sfmuseum only has the top line of the decal...

Here's the original small sized model used... they only had the first two lines on it...

So it's the green screen FULL SIZED MODEL car of just the front end used for the close up shots that has the decal in full detail on it. If anyone has pictures of THAT or know what happened to the prop that would be sweet!